Tool joint



Sept. 9, 1924.

C. R. EDWARDS TOOL JOINT Filed on. 14; 19 19 ?etent et. 9, i224 e i. rsrori ore srnrss a n. or nonsrorv, it

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Application filled @ctober 1d, 1919. Serial No. 380,555.

To all whom it may concern:

Be it known that I, CHAnLns REDwAnos, citizen of the United States,residin at Houston, in the county of Harris and tat/e 7 necting togetherthe adjacent ends of the sections of a drill stern. In drilling wells bythe well known rotary process, a drill stem is employed formed ofsections and to the lower end of which the drill bit is attached. Indrilling the bit becomes worn and the stem must be withdrawn from thebore, for the purpose of substituting a new hit andlin withdrawing thestem, the stem must be broken up, usually at every third joint, so thatit can be easily handled and when the new hit is substituted for the oldone, the stem must be again made up and let down into the bore. indescribed has been desied so that the stem may be easily broken up as itis being withdrawn .trom' the bore and easily made up 1 when it is beinglet down into the bore. T e joint may also be used to connect the griefstem or the drill bit to the drill stem.

Another object of the invention is to provide a tool joint of thecharacter described so constructed that the stem may be readily heldsuspended in the bore by elevators while it is bein made up, or brokenup.

With the above and other obgects in view, the invention has particularre ation to certain novel features of construction, arrangement orparts, and use an example of which is given in this specification andillustrated in the accompanying drawing wherein: Figure 1 shows avertical sectional view of the device and Figure 2 shows a sectionalview taken on the line 2-2 of Figure 1.

Referring now, more particularly to the drawing, the numerals 1 and 2,respectively, refer to the adjacent sections of the drill stem, thelower end of the section 1 bein shown reduced and somewhat thickened anthe upper end of section 2 being shown up-- set, or formed withthickened walls and externally threaded. As shown in Fl ure 1, theadjacent ends of said sections are orined with projecting interlockingshoulders 3 and The tool joint here-' 4, said resective shoulders beinspaced apart, and t e shoulders 3 arrange in stagred relation to theshoulders 4t and fitting utween them so as to form, in efi'ect, aclutch. These intermeshing shoulders may be of various forms, thepreferredforin being shown. lower end of the section 1 is a ring likenut 5, which is provided to hold the connecting coupling 6 againstdetachment from sai section. This coupling is sleeve like in form andits upper end has the inwardly extending annular flange 7 which fitsclosely,

wherein the reduced lower end of the section 1. This coupling is firstfitted over said reduced end and the nut 5, then screwed in lace. Thelower end of the'coupling 6 is internally l threaded and when it isdesired to couple together the two sections of the string, said coupling6 is first secured Screwed upon the reduced upon the section 1 asexplained and is then threaded on to the upper end of the section 2 andscrewed up tight so as to form a tight. fitting joint. The coupling 6sustains the weight of the stem, but as the stem is rotated in the wellknown manner, in the process of drilling, the interloclrin shoulders 3and 4 will sustain the torsiona strain Underneath the coupling 6 thereis an annular shoulder 8, carried by the section 2, and while the stemis bein. made up or broken up as above explains this shoulder rests u onthe upper end of the elevators 9 of wel known construction, which inturn are sustained by the rotary table of the well known rotary, one ofthe chief lectures of this form of tool joint residing in the provisionof said shoulder to engage with and rest upon the elevators and tosustain the weight of the stern down the here.

at l claim is: s A tool joint, including two ipe sections whose endsabut, one of said u utting ends being reduced and thickened andthe otherabutting end being nest and formed with thickened walls wich areexternally threaded, interlocking shoulders carried by said abuttingends, said shoulders being spaced apart and arranged. in staggerrelation, the shoulders of one end fitting b tween the shoulders or theother end, a ringlike not threaded onto said reduced end, a couplingtitted around said reduced end, said coupling heing sleeve-like in formand having one end formed into an inwardlyextending unnnlar flange whichengages littl- Q images-v1 against said null and having its other eminame to this specificatiun in the presexdce 01E lnternally inhreadediand thus adeped L0 be We subscnblng wmlesses.

screwed onto the outwardly threaded upset end of the other section and aset screw by CHARLES EDWVARDS means of which said ringlike nut is lockedWitnesses:

against unscrewing. E. V. PARDWAY3 in testimony whereef I have slgmed myALBERTA ALLEN,

